GB2329805B - Read error recovery utilizing ECC and read channel quality indicators - Google Patents

Read error recovery utilizing ECC and read channel quality indicators

Info

Publication number
GB2329805B
GB2329805B GB9825014A GB9825014A GB2329805B GB 2329805 B GB2329805 B GB 2329805B GB 9825014 A GB9825014 A GB 9825014A GB 9825014 A GB9825014 A GB 9825014A GB 2329805 B GB2329805 B GB 2329805B
Authority
GB
United Kingdom
Prior art keywords
read
channel quality
error recovery
quality indicators
recovery utilizing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9825014A
Other versions
GB2329805A (en
GB9825014D0 (en
Inventor
Stephen Reeves Genheimer
Jimmie Ray Shaver
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of GB9825014D0 publication Critical patent/GB9825014D0/en
Publication of GB2329805A publication Critical patent/GB2329805A/en
Application granted granted Critical
Publication of GB2329805B publication Critical patent/GB2329805B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/13—Linear codes
    • H03M13/15—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes
    • H03M13/151—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes using error location or error correction polynomials
    • H03M13/154—Error and erasure correction, e.g. by using the error and erasure locator or Forney polynomial
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10481—Improvement or modification of read or write signals optimisation methods
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/13—Linear codes
    • H03M13/15—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes
    • H03M13/151—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes using error location or error correction polynomials
    • H03M13/1515—Reed-Solomon codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/3707—Adaptive decoding and hybrid decoding, e.g. decoding methods or techniques providing more than one decoding algorithm for one code
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
GB9825014A 1996-05-15 1997-03-27 Read error recovery utilizing ECC and read channel quality indicators Expired - Fee Related GB2329805B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1776996P 1996-05-15 1996-05-15
PCT/US1997/004906 WO1997043835A1 (en) 1996-05-15 1997-03-27 Read error recovery utilizing ecc and read channel quality indicators

Publications (3)

Publication Number Publication Date
GB9825014D0 GB9825014D0 (en) 1999-01-06
GB2329805A GB2329805A (en) 1999-03-31
GB2329805B true GB2329805B (en) 2000-09-20

Family

ID=21784439

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9825014A Expired - Fee Related GB2329805B (en) 1996-05-15 1997-03-27 Read error recovery utilizing ECC and read channel quality indicators

Country Status (6)

Country Link
US (1) US6043946A (en)
JP (1) JP2000510989A (en)
KR (1) KR20000011007A (en)
DE (1) DE19781772T1 (en)
GB (1) GB2329805B (en)
WO (1) WO1997043835A1 (en)

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JP3584967B2 (en) * 2000-08-04 2004-11-04 インターナショナル・ビジネス・マシーンズ・コーポレーション Data reproducing apparatus and reproducing method
US6862151B2 (en) * 2000-11-15 2005-03-01 Seagate Technologies Llc Method and apparatus for read error recovery
US6785077B2 (en) 2001-04-02 2004-08-31 Seagate Technology Llc Disc drive pattern zero verification test
US7290184B2 (en) * 2001-08-23 2007-10-30 Seagate Technology Llc Emulation system for evaluating digital data channel configurations
US6731442B2 (en) * 2001-10-02 2004-05-04 Seagate Technologies Llc Method and apparatus for detecting media defects
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JP2004014090A (en) * 2002-06-11 2004-01-15 Fujitsu Ltd Data reproduction system, reproduction method and circuit for performing controlling of reproduction system
JP2004087028A (en) * 2002-08-28 2004-03-18 Toshiba Corp Disk drive and data reproducing method
JP4040943B2 (en) * 2002-10-01 2008-01-30 株式会社東芝 Disk storage device and data reproduction method
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US7793020B1 (en) * 2002-11-27 2010-09-07 International Business Machines Corporation Apparatus and method to read information from an information storage medium
US7831869B2 (en) * 2003-01-27 2010-11-09 Hewlett-Packard Development Company, L.P. DDS logical data grouping
WO2005013542A1 (en) * 2003-08-05 2005-02-10 Fujitsu Limited Reproduction relay method and device thereof
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US20060242450A1 (en) * 2005-04-11 2006-10-26 Li-Lien Lin Methods and apparatuses for selectively rebuffering and decoding a portion of a data block read from an optical storage medium
US20070011513A1 (en) * 2005-06-13 2007-01-11 Intel Corporation Selective activation of error mitigation based on bit level error count
US8205146B2 (en) * 2005-07-21 2012-06-19 Hewlett-Packard Development Company, L.P. Persistent error detection in digital memory
US7561357B2 (en) * 2005-08-11 2009-07-14 Seagate Technology Llc Decoder with energization control circuit
TW200710660A (en) * 2005-09-09 2007-03-16 Via Tech Inc Detection and recovery circuit of disk array and its method
US7747907B2 (en) * 2005-09-20 2010-06-29 Seagate Technology Llc Preventive recovery from adjacent track interference
JP2007133986A (en) * 2005-11-11 2007-05-31 Nec Electronics Corp Semiconductor memory
US8756399B2 (en) * 2006-01-25 2014-06-17 Seagate Technology Llc Mutable association of a set of logical block addresses to a band of physical storage blocks
JP2008084465A (en) * 2006-09-28 2008-04-10 Fujitsu Ltd Storage device and controller
US8176386B1 (en) 2007-04-10 2012-05-08 Marvell International Ltd. Systems and methods for processing streaming data
US20090034109A1 (en) * 2007-07-30 2009-02-05 Kabushiki Kaisha Toshiba 1-1 Disk drive apparatus and media defect detection method
US7800853B1 (en) 2008-12-03 2010-09-21 Western Digital Technologies, Inc. Correcting servo sectors in a disk drive
US8116025B1 (en) 2008-12-18 2012-02-14 Western Digital Technologies, Inc. Disk drive executing retry operation after adjusting jog value in response to gain control
US8413313B2 (en) * 2009-11-06 2013-04-09 David Delon Williams Divided-end artificial limb
WO2012058328A1 (en) * 2010-10-27 2012-05-03 Sandforce, Inc. Adaptive ecc techniques for flash memory based data storage
US8619385B1 (en) 2011-01-28 2013-12-31 Western Digital Technologies, Inc. Disk drive biasing sync pattern of an extended sync mark
US8693123B1 (en) 2011-06-27 2014-04-08 Western Digital Technologies, Inc. Disk drive correcting high order gray code using track estimator and decoding low order track code separately
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US9294133B1 (en) * 2013-01-29 2016-03-22 Marvell International Ltd. Method and apparatus for error correction
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US10445171B2 (en) * 2016-02-29 2019-10-15 Seagate Technology Llc On-the-fly error detection algorithm during retry procedure
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Also Published As

Publication number Publication date
GB2329805A (en) 1999-03-31
GB9825014D0 (en) 1999-01-06
WO1997043835A1 (en) 1997-11-20
KR20000011007A (en) 2000-02-25
JP2000510989A (en) 2000-08-22
DE19781772T1 (en) 1999-04-29
US6043946A (en) 2000-03-28

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050327